INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-net-kasan-gce-2,10.128.15.220' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.300918] ------------[ cut here ]------------ [ 52.301645] WARNING: CPU: 1 PID: 2982 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 [ 52.302815] Kernel panic - not syncing: panic_on_warn set ... [ 52.302815] [ 52.303788] CPU: 1 PID: 2982 Comm: syzkaller750387 Not tainted 4.14.0-rc3+ #72 [ 52.304754] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.305976] Call Trace: [ 52.306336] dump_stack+0x194/0x257 [ 52.306831] ? arch_local_irq_restore+0x53/0x53 [ 52.307485] panic+0x1e4/0x417 [ 52.307922] ? __warn+0x1d9/0x1d9 [ 52.308391] ? show_regs_print_info+0x65/0x65 [ 52.309007] ? kmalloc_slab+0x5d/0x70 [ 52.309521] __warn+0x1c4/0x1d9 [ 52.309980] ? kmalloc_slab+0x5d/0x70 [ 52.310495] report_bug+0x211/0x2d0 [ 52.310996] fixup_bug+0x40/0x90 [ 52.311453] do_trap+0x260/0x390 [ 52.311917] do_error_trap+0x120/0x390 [ 52.312446] ? do_trap+0x390/0x390 [ 52.312926] ? kmalloc_slab+0x5d/0x70 [ 52.313441] ? lock_release+0xd70/0xd70 [ 52.313984] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.314637] do_invalid_op+0x1b/0x20 [ 52.315139] invalid_op+0x18/0x20 [ 52.315607] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 52.316196] RSP: 0018:ffff8801ce1874b0 EFLAGS: 00010246 [ 52.316911] RAX: 0000000000000000 RBX: ffff8801ce187748 RCX: 0000000000000007 [ 52.317868] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffff8801 [ 52.318826] RBP: ffff8801ce1874b0 R08: ffff8801c134f1c0 R09: ffff8801ce187b10 [ 52.319779] R10: ffff8801ce6a2300 R11: 0000000000000000 R12: ffff8801ce187ab0 [ 52.320737] R13: ffff8801ce187b10 R14: 00000000014080c0 R15: ffff8801ce7437c0 [ 52.321715] __kmalloc+0x25/0x760 [ 52.325144] ? __ipv6_dev_get_saddr+0x4f0/0x4f0 [ 52.329783] ? ip6_setup_cork+0x1e8/0x15c0 [ 52.333994] ip6_setup_cork+0x1e8/0x15c0 [ 52.338031] ? __ip6_append_data.isra.43+0x3340/0x3340 [ 52.343285] ip6_make_skb+0x282/0x530 [ 52.347057] ? ip_reply_glue_bits+0xb0/0xb0 [ 52.351348] ? ip6_push_pending_frames+0xe0/0xe0 [ 52.356074] ? ip6_dst_hoplimit+0x10d/0x420 [ 52.360372] ? ip6_route_output_flags+0x1f1/0x2b0 [ 52.365193] ? __lock_is_held+0xbc/0x140 [ 52.369234] ? ip6_dst_hoplimit+0xc1/0x420 [ 52.373439] ? ip6_find_1stfragopt+0x240/0x240 [ 52.377998] udpv6_sendmsg+0x2769/0x3380 [ 52.382034] ? ip_reply_glue_bits+0xb0/0xb0 [ 52.386341] ? udpv6_setsockopt+0x80/0x80 [ 52.390458] ? find_held_lock+0x39/0x1d0 [ 52.394500] ? lock_downgrade+0x990/0x990 [ 52.398618] ? lock_downgrade+0x990/0x990 [ 52.402739] ? lock_release+0xd70/0xd70 [ 52.406692] ? do_raw_spin_trylock+0x190/0x190 [ 52.411255] ? __local_bh_enable_ip+0x9d/0x160 [ 52.415812] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 52.420796] ? release_sock+0x1d4/0x2a0 [ 52.424744] ? _raw_spin_unlock_bh+0x30/0x40 [ 52.429119] ? release_sock+0x1d4/0x2a0 [ 52.433076] ? udp_v6_get_port+0x9c/0xc0 [ 52.437113] inet_sendmsg+0x11f/0x5e0 [ 52.440882] ? inet_sendmsg+0x11f/0x5e0 [ 52.444823] ? __might_sleep+0x95/0x190 [ 52.448766] ? inet_recvmsg+0x5f0/0x5f0 [ 52.452710] ? selinux_socket_sendmsg+0x36/0x40 [ 52.457350] ? security_socket_sendmsg+0x89/0xb0 [ 52.462075] ? inet_recvmsg+0x5f0/0x5f0 [ 52.466023] sock_sendmsg+0xca/0x110 [ 52.469708] SYSC_sendto+0x358/0x5a0 [ 52.473395] ? SYSC_connect+0x480/0x480 [ 52.477348] ? mm_fault_error+0x2c0/0x2c0 [ 52.481468] ? ipv6_setsockopt+0xa8/0x150 [ 52.485593] ? __do_page_fault+0xd60/0xd60 [ 52.489812] ? lockdep_sys_exit+0x47/0xf0 [ 52.493926] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 52.498741] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 52.503730] SyS_sendto+0x40/0x50 [ 52.507156] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 52.511878] RIP: 0033:0x43fea9 [ 52.515039] RSP: 002b:00007ffca3bf5188 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 52.522719] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fea9 [ 52.529959] RDX: 0000000000000000 RSI: 000000002052bfcc RDI: 0000000000000003 [ 52.537196] RBP: 0000000000000086 R08: 0000000020e0afe4 R09: 000000000000001c [ 52.544433] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 52.551673] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 52.559043] Dumping ftrace buffer: [ 52.562583] (ftrace buffer empty) [ 52.566263] Kernel Offset: disabled [ 52.569867] Rebooting in 86400 seconds..